616221201 has 4 divisors (see below), whose sum is σ = 821628272. Its totient is φ = 410814132.

The previous prime is 616221191. The next prime is 616221223. The reversal of 616221201 is 102122616.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 616221201 - 2¹⁴ = 616204817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (616221241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102703531 + ... + 102703536.

It is an arithmetic number, because the mean of its divisors is an integer number (205407068).

Almost surely, 2^616221201 is an apocalyptic number.

It is an amenable number.

616221201 is a deficient number, since it is larger than the sum of its proper divisors (205407071).

616221201 is a wasteful number, since it uses less digits than its factorization.

616221201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205407070.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 616221201 is about 24823.8031131412. The cubic root of 616221201 is about 850.9660071582.

Adding to 616221201 its reverse (102122616), we get a palindrome (718343817).

The spelling of 616221201 in words is "six hundred sixteen million, two hundred twenty-one thousand, two hundred one".